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<?php
/**
* Migration for StEP00294
*
* @author Thomas Hackl <thomas.hackl@uni-passau.de>
* @license GPL2 or any later version
* @since Stud.IP 3.4
*
* @see https://develop.studip.de/trac/ticket/6180
*/
class StEP00294InnoDB extends Migration
{
/**
* Describe what the migration does: convert tables to InnoDB.
* @return string
*/
public function description()
{
return 'Converts the Stud.IP database tables to InnoDB engine';
}
/**
* Convert all tables to InnoDB engine, using Barracuda format if supported.
*/
public function up()
{
global $DB_STUDIP_DATABASE;
// Check if InnoDB is enabled in database server.
$engines = DBManager::get()->fetchAll("SHOW ENGINES");
$innodb = false;
foreach ($engines as $e) {
// InnoDB is found and enabled.
if ($e['Engine'] == 'InnoDB' && in_array(strtolower($e['Support']), ['default', 'yes'])) {
$innodb = true;
break;
}
}
if ($innodb) {
$start = microtime(true);
// Tables to ignore on engine conversion.
$ignore_tables = [];
// Get version of database system (MySQL/MariaDB/Percona)
$data = DBManager::get()->fetchFirst("SELECT VERSION() AS version");
$version = $data[0];
// Fetch all tables that need to be converted.
$tables = DBManager::get()->fetchFirst("SELECT TABLE_NAME
FROM `information_schema`.TABLES
WHERE TABLE_SCHEMA=:database AND ENGINE=:oldengine
ORDER BY TABLE_NAME",
[
':database' => $DB_STUDIP_DATABASE,
':oldengine' => 'MyISAM',
]);
/*
* lit_catalog needs fulltext indices which InnoDB doesn't support
* in older versions.
*/
if (version_compare($version, '5.6', '<')) {
$stmt_fulltext = DBManager::get()->prepare("SHOW INDEX FROM `:table` WHERE Index_type = 'FULLTEXT'");
foreach ($tables as $k => $t) {
$stmt_fulltext->bindParam(':table', $t, StudipPDO::PARAM_COLUMN);
$stmt_fulltext->execute();
if ($stmt_fulltext->fetch()) {
$ignore_tables[] = $t;
unset($tables[$k]);
}
}
if (count($ignore_tables)) {
$this->announce('The following tables needs fulltext indices '.
'which are not supported for InnoDB in your database '.
'version, so the tables will be left untouched: ' . join(',', $ignore_tables));
}
}
// Use Barracuda format if database supports it (5.5 upwards).
if (version_compare($version, '5.5', '>=')) {
// Get innodb_file_per_table setting
$data = DBManager::get()->fetchOne("SHOW VARIABLES LIKE 'innodb_file_per_table'");
$file_per_table = $data['Value'] ?: 'on';
// Check if Barracuda file format is enabled
$data = DBManager::get()->fetchOne("SHOW VARIABLES LIKE 'innodb_file_format'");
$file_format = $data['Value'] ?: 'barracuda';
// All settings ok, use Barracuda.
if (strtolower($file_per_table) == 'on' && strtolower($file_format) == 'barracuda') {
$rowformat = 'DYNAMIC';
// Barracuda cannot be enabled, use Antelope format.
} else {
$this->announce('Barracuda row format cannot be used for '.
'the following reason(s), falling back to Antelope.');
if (strtolower($file_per_table) != 'on') {
$this->announce('- file_per_table is not enabled');
}
if (strtolower($file_format) != 'barracuda') {
$this->announce('- file_format is not set to "Barracuda"');
}
$rowformat = 'COMPACT';
}
} else {
$this->announce('Barracuda row format is supported only in '.
'MySQL 5.5 and up, falling back to Antelope.');
$rowformat = 'COMPACT';
}
// Prepare query for table conversion.
$stmt = DBManager::get()->prepare("ALTER TABLE `:table` ROW_FORMAT=:rowformat ENGINE=:newengine");
$stmt->bindParam(':rowformat', $rowformat, StudipPDO::PARAM_COLUMN);
$newengine = 'InnoDB';
$stmt->bindParam(':newengine', $newengine, StudipPDO::PARAM_COLUMN);
// Now convert the found tables.
foreach ($tables as $t) {
try {
$stmt->bindParam(':table', $t, StudipPDO::PARAM_COLUMN);
$stmt->execute();
} catch (Exception $e) {
throw new Exception('Error while migrating table "' . $t . '", error: ' . $e->getMessage());
}
}
$end = microtime(true);
$duration = $end - $start;
$human_duration = sprintf("%02d:%02d:%02d",
($duration / 60 / 60) % 24, ($duration / 60) % 60, $duration % 60);
$this->announce('Migration finished, duration ' . $human_duration);
// InnoDB not enabled, do nothing but show a message.
} else {
throw new Exception('Migration 186: The storage engine InnoDB is not enabled in your '.
'database installation, tables cannot be converted.');
}
}
/**
* Convert all database tables back to MyISAM engine.
*/
public function down()
{
global $DB_STUDIP_DATABASE;
// Fetch all tables that need to be converted.
$tables = DBManager::get()->fetchFirst("SELECT TABLE_NAME
FROM `information_schema`.TABLES
WHERE TABLE_SCHEMA=:database AND ENGINE=:oldengine
ORDER BY TABLE_NAME",
[
':database' => $DB_STUDIP_DATABASE,
':oldengine' => 'InnoDB'
]);
// Prepare query for table conversion.
$stmt = DBManager::get()->prepare("ALTER TABLE `:table` ENGINE=:newengine");
$newengine = 'MyISAM';
$stmt->bindParam(':newengine', $newengine, StudipPDO::PARAM_COLUMN);
// Now convert the found tables.
foreach ($tables as $t) {
$stmt->bindParam(':table', $t, StudipPDO::PARAM_COLUMN);
$stmt->execute();
}
}
}
|
